Casey has Hashimoto’s Disease, which causes her thyroid gland to not function properly. She regularly sees a specialist to help manage this condition. On which body system does this specialist MOST likely concentrate?

The thyroid gland produces hormones, which are chemical messengers that help regulate body functions such as metabolism. Glands that produce hormones belong to the endocrine system, so Casey’s specialist would most likely concentrate on the endocrine system. The lymphatic, circulatory, and nervous systems have different primary functions.

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